A river in Southwest Asia flowing 1,150 miles east-southeast from the Armenian Highland in Turkey through Iraq. It forms the eastern edge of classical Mesopotamia. It unites with the Euphrates River to form the Shatt al-Arab before flowing into the Persian Gulf.

Origin

From LatinTigris, from Ancient Greek Î¤Î¯Î³ÏÎ¹Ï‚ (Tigris), an alternative form of Î¤Î¯Î³ÏÎ·Ï‚ (TigrÄ“s).